398002460

素因数分解:

$2^2\times 5^1\times {\mathrm{19900123}}^1$

素因数の和:19900132

約数の個数: 12

約数和(自身を含む): 835805208

約数和(自身を除く): 437802748

約数列:

[1, 2, 4, 5, 10, 20, 19900123, 39800246, 79600492, 99500615, 199001230, 398002460]

約数ペア:

[(1, 398002460), (2, 199001230), (4, 99500615), (5, 79600492), (10, 39800246), (20, 19900123)]